[souffle]

Have you been able to check him underneath nicki because it they can't clean themselves or move much they tend to get in a mess underneath and can get very sore. I'd try and check on that if you haven't seen him toileting.
At this stage if he isn't I would take him in. It is very hard to do but you have to know in your heart and let him go peacefully. He has trusted you now with the choice. I hope his path is gentle.